Gmail Notification Issues

I have been having issues with notifications created by the Gmail app. When i receive an email and click the delete option in the pulldown (I have delete set as my default action), the notification is not removed. I see the popup saying that the email was deleted (and the email was actually deleted), however the original notification still remains. I have the gmail client set up the exact same as I did on my Note 4 which did not have the same issue.

also, does anyone know why when an item goes into the priority inbox 3 gmail notifications are created?i havent been able to figure that one out even after a year since the change to the app.